These are so easy and delicious! I made these bars for a party at my school, and everybody loved them. I think it would be really hard to mess these up since the main ingredients are just butter, sugar, and chocolate(: Those are definitely the three best ingredients ever created. The flavors of shortbread, caramel, nuts, and chocolate go super well together in this dreamy bar. The bottom layer is a buttery shortbread, and next is a wonderful crunch of nuts, after that is a sweet, toffee-like caramel, and then the final layer is a delightful mouthful of melted chocolate chips. It doesn't get much better than that.